Duraflo 649000G Foundation Vent, 19.81 in W, 9.12 in H, 51 sq-in Net Free Ventilating Area, Gray

Installed in the block foundation to provide ventilation of crawlspaces and under home spaces. Fits standard, metric and queen brick and block. Provides the ability to open and close for changes in needs based on seasonality.Unit: EAUPC: 662671643223Model